Threat Encyclopedia

Selected viruses, spyware, and other threats: sorted alphabetically

Freddy

Freddy.1870

This is a memory resident, parasitic virus, attacking COMMAND.COM without altering its total length. When an infected program is executed more than a month after the infection took place the virus overwrites disk sectors by the string “Freddy Krg”. In the virus body also strings “COMMAND.COM*.COM” can be found.

Freddy.2271
This is an improved variant of the previous virus. It is a memory resident, polymorphic virus infecting COM and EXE files. Length of COMMAND.COM will not be increased at the infection because the virus will write its body into the free area in the code of that file. Like the shorter variant, it also contains a destructive code. Upon writing on disk the virus sometimes writes random bytes. There are the following strings in the encrypted body: